Jangle

Yes that's what I thought but there is too much manufacturers for this diode (1N4148) I don't know if they are different on specs https://www.alldatasheet.com/view.jsp?Searchword=1n4148 datasheet&gclid=CjwKCAjw3-bzBRBhEiwAgnnLCt96WVJkp1XXia0XNh6fsFqITvXWKc02JdxbmmihfKIPsKOX1MCXXRoCXysQAvD_BwE But just peeking one : https://www.alldatasheet.com/datasheet-pdf/pdf/733245/SURGE/1N4148.html I don't understand too much but I think the Foward Current (normal diode behave) is MAX 1v and beyond that (when works in reverse orientation) the Reverse Breakdown Voltage could be 5/25/50v?

Yes! I saw that too but unfortunately I don't have an Inductance Meter so I'll have to wait after the quarantine to get one The cr5 is behaving strangely.. When the machine is plugged but not powered gives me polarity on both sides. But when the machine is on , is behaving "normally" (I don't test it with one leg lift but I will) An another thing is that I don't get any voltage around him..so maybe is the POKEY? Between leg 16 and cr5 don't get any voltage neither..No amps too , only continuity. So I think that is all for now Thank you all for the support!

I check the service manual of 130XE and in the section of Troubleshooting says: BLACK SCREEN could be +5VDC, L4-L8, ANTIC, CR8, Power Plug, SW1, Y1 I don't have CR8 but I have CR5 (Zener diode ? I don't know if they are the same) near of Y1 and gives me polarity on both sides.. Could that be the only problem ? The other three (CR2,CR3,CR4) are measuring normal.. And now I found this : What would cause that Diode to short circuit?

I tried again and now I get a perfect BLACK SCREEN on channel 3 at 61.35MHz with RF But at 60.5MHz (using Tune Fine) gives me this: Monitor plug sends no signal. That's no good news right? Measuring with Multimeter the monitor output gives me: PIN 1 => 1.29 PIN 4 => 0.31 PIN 3 => 0.36 PIN 5 => 0

Thanks! Results: BASIC => 4.82 OS ROM => 4.82 MMU => 4.88 Now I connected to the TV in channel 2 and 3 and it seems that wants to get signal (before I was only testing on Monitor plug). At least the signal changes when is powered on. That means something to you ? Never tried RF because Monitor has more definition and was more simple to make the cable (and I wasn't have an antenna cable adapter too)

I check again because ~4.5 was barely accurate. This was the result: CPU PIN 8 4.82 PIN 2 4.82 PIN 7 3.38 PIN 5 0 PIN 6 4,77 ANTIC PIN 4 4,86 PIN 21 4,82 GTIA PIN 27 4,79 POKEY PIN 18 4,77 PIN 2 OSCILLATES AT 0.5 - 4.8 PIA PIN 20 => 4.84 FREDDIE PIN 40 => 4.88 CHIPS THAT I DON'T KNOW WHERE IS THE VCC (but managed to get volts) : BASIC PIN 13 => 4.81 PINS 14 15 16 17 18 => 4.82v OS PIN 1 => 4.81 PIN 12 => 4.88 MMU PIN 12 => 4.88 Anything more to check? About the Crystal Clock..do you have any info for test? What about the capacitor ? Shouldn't give any sign of continuity or something? Because I get nothing with the multimeter Thanks!!

What do you mean with "load" ? Test the chips voltage with the console on? I managed to test the CPU a couple of days ago (pin 5 or 6 I don't remember well) and I get ~4.5V same with the ANTIC. Maybe tomorrow I will post voltage on all the chips.. but I'm little suspicious about the Crystal and the Capacitor (?) attached next to it.. Any info about that? How can I test it? Only with an Oscillloscope ? Another thing I noticed is that one user post the same Atari And his board has and extra piece of hardware on the OSC that I don't have. But mine has the Y1 that he doesn't have.. so I Don't know , maybe the Y1 Crystal is a replacement of that hardware he has.

The only thing that is weird are the Amps... Gives me 2.4 but after that everything is good I used this image to test it

The PSU works fine I tested with a Multimeter.. Why do you ask?

HI! No image at all , not blank not white , nothing , no signal .. Is like there is nothing connected to the TV. I'm using a 220v to 5v 1.5A . It's an original PSU.

Thanks for your replies! I will read that manual and test when I get an Oscilloscope. Any specific settings for the Osci? @tf_hh Can I use Syschek on this? I need some kind of Extension Port or specific wiring connection ?

@tf_hh I did the CI's HOT-TEST and the only one getting warm (not to hot) is the CPU but I think that is normal? the other chips seems fine (drams , GTIA , etc) If the CPU is bad.. is there some thing that can I test before replacing it? In case something it's faulting and burn the chip again. @tf_hh Can you help with any suggestion?

Thanks for your reply! This could sound dumb but there is a way to test those chips without replacing it? I mean with a oscilloscope or multi-meter or something? Where I live is not easy to find these things.. Is there a trusted page where can I order those chips? Yes, in Argentina we use PAL.. When you say clock , do you mean that crystal at the bottom? I'm learning about this console and I managed to identify some chips (I don't know where is the EMMU) This is a spec about what I found: board CO70025 REV C cpu CO14806-I2 antic CO21698-01 gtia CO14889-01 pia CO14795-I2 pokey CO12294B-01 freddie CO61921-31 (found in 130XE models) os CO61598B basic CO24947A-01 mmu CO61618-20

I build a custom monitor cable using this schema (viewed from back of console) I'll try the hot-chip test that you suggest..thx!

Hi! I own a Atari 65XE that doesn't show any image at all. It's from Argentina and it runs with PAL instead of NTSC. It's my new project to revive this beauty and I don't know where to begin testing and what may be the problem so.. could anyone help me with this? It seems that this console has been repaired long time along (I added pictures of that places) so if anyone notes anything rare , please let me know. P.S : I don't know anything of this machines , so If anyone has some video or schematics explaining chips, etc I would be thankful Here are some pics: